Spiral Matrix Traversal in DSA C - Interactive Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to initialize the starting row index for spiral traversal.

DSA C

int top = [1];

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A-1

B0

C1

Dn

Attempts:

3 left

💡 Hint

Common Mistakes

Setting top to 1 instead of 0 causes skipping the first row.

Using negative indices which are invalid in C arrays.

The top row index starts at 0 because array indices in C start from 0.

2fill in blank

medium

Complete the code to move the left boundary right after traversing the left column.

DSA C

left[1];

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A++

B--

C+=

D-=

Attempts:

3 left

💡 Hint

Common Mistakes

Using -- decreases left, moving boundary left instead of right.

Using -= or += without a value causes syntax errors.

After traversing the left column, we move the left boundary right by incrementing it.

3fill in blank

hard

Fix the error in the loop condition to traverse the top row from left to right.

DSA C

for (int i = left; i [1]= right; i++) {
    printf("%d ", matrix[top][i]);
}

Drag options to blanks, or click blank then click option'

A<

B>

C<=

D>=

Attempts:

3 left

💡 Hint

Common Mistakes

Using < excludes the last element in the top row.

Using > or >= causes the loop to never run or run incorrectly.

The loop should include the right boundary, so use <= to go from left to right inclusive.

4fill in blank

hard

Fill both blanks to correctly traverse the right column from top to bottom.

DSA C

for (int i = [1]; i [2] bottom; i++) {
    printf("%d ", matrix[i][right]);
}

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Atop + 1

Btop

C<=

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Starting at top repeats the corner element already printed.

Using < excludes the bottom row element.

Start from the row below top (top + 1) and go up to bottom inclusive (using <=).

5fill in blank

hard

Fill all three blanks to correctly traverse the bottom row from right to left.

DSA C

for (int i = [1]; i [2] [3]; i--) {
    printf("%d ", matrix[bottom][i]);
}

Drag options to blanks, or click blank then click option'

Aright - 1

Bright

C>=

Dleft

Attempts:

3 left

💡 Hint

Common Mistakes

Starting at right repeats the corner element.

Using > excludes the leftmost element.

Using left as a value instead of a variable causes errors.

Start from one left of right (right - 1), go while i is greater than or equal to left, decrementing i.